Methods and Devices for Radio Bearer Release

1. A method for radio bearer release performed in a base station node of a communication system, the base station node providing one or more radio bearers to a user equipment, the communication system comprising a serving gateway, the method comprising: receiving an error message from the serving gateway, the error message indicating a faulty radio bearer, awaiting, for a delay time, additional error messages from the serving gateway indicating one or more other faulty radio bearers, wherein awaiting the delay time comprises waiting a random time period, and releasing the one or more radio bearers being indicated as faulty.

2. The method as claimed in claim 1 , wherein the awaiting a delay time comprises waiting a time period set based on one or more of: a predetermined period of time; a traffic load of the base station node; a processor capacity of a mobility management node; a load state of the mobility management node; a number of delay timers started for other user equipment; and a number of radio bearer releases initiated during a specified period of time.

3. The method as claimed in claim 1 , wherein the releasing of one or more radio bearers comprises transmitting a radio bearer release message to the user equipment for releasing the one or more radio bearers indicated as faulty.

4. The method as claimed in claim 1 , wherein the releasing of one or more radio bearers comprises transmitting, to a mobility management node of the communication system, a message indicating the one or more released radio bearers.

5. The method as claimed in claim 1 , wherein the awaiting a delay time comprises determining if the user equipment is provided with multiple radio bearers and waiting, for a predetermined time period, to determine if further provided radio bearers are indicated as faulty.

6. The method as claimed in claim 5 , wherein, if all radio bearers provided to the user equipment are determined to be faulty, the releasing of one or more radio bearers comprises at least one of transmitting a radio resource control connection release message to the user equipment and transmitting a user equipment context release request message to a mobility management node of the communication system.

7. A base station node of a communication system for radio bearer release, the base station node being configured to provide one or more radio bearers to a user equipment, the communication system comprising a serving gateway, the base station node comprising a processor being configured to: receive an error message from the serving gateway, the error message indicating a faulty radio bearer, await, for a delay time, additional error messages from the serving gateway indicating one or more other faulty radio bearers, wherein the processor is configured to await a delay time set as a random time period, and release the one or more radio bearers being indicated as faulty.

8. The base station node as claimed in claim 7 , wherein the processor is configured to await a delay time set to a time period based on one or more of: a predetermined period of time; a traffic load of the base station node; a processor capacity of a mobility management node; a load state of the mobility management node; a number of delay timers started for other user equipment; and a number of radio bearer releases initiated during a specified period of time.

9. The base station node as claimed in claim 7 , wherein the processor is configured to perform a radio bearer release by transmitting a bearer release message to the user equipment for releasing the one or more radio bearer indicated as faulty.

10. The base station node as claimed in claim 7 , wherein the processor is configured to perform a radio bearer release procedure by transmitting to a mobility management node of the communication system, a message indicating the released radio bearer.

11. The base station node as claimed in claim 7 , wherein the processor is configured to await a delay time by determining if the user equipment is provided with multiple radio bearers and configured to wait, for a predetermined time period, to determine if all provided radio bearers are indicated as faulty.

12. A computer program product embodied on a non-transitory computer readable medium for use in a base station node for radio bearer release, the base station node providing one or more radio bearers to a user equipment, the communication system comprising a serving gateway, and a mobility management node, the computer program product comprising computer program code which when run on a processor of the base station node, causes the processor to perform the steps of: receiving an error message from the serving gateway, the error message indicating a faulty radio bearer, awaiting for a delay time, additional error messages from the serving gateway indicating one or more other faulty radio bearers, wherein the awaiting the delay time comprises waiting a random time period, and releasing the one or more radio bearers being indicated as faulty.